Fill-Rite 825 Digital Meter / 2-20 GPM 2-20 GPM, +/-0.2% accuracy ,Pressure to 125 psi max -10F - 130F temperature range, 360 positioning display, Quick one step calibration Waterproof, corrosion-resistant, Glass filled polypropylene housing 1 FNPT ports, Fluorocarbon seals, Battery powered LCD display, Two alkaline batteries included